using System;
using System.Collections.Generic;

namespace IdleSpectator;

/// <summary>World-session immutable observation store. Persistence is added in Phase 5.</summary>
public static class NarrativeEventStore
{
    private static readonly Dictionary<string, NarrativeEventRecord> Events =
        new Dictionary<string, NarrativeEventRecord>(StringComparer.Ordinal);

    public static int Count => Events.Count;

    public static void Clear()
    {
        Events.Clear();
    }

    public static NarrativeEventRecord Get(string id)
    {
        if (string.IsNullOrEmpty(id))
        {
            return null;
        }

        Events.TryGetValue(id, out NarrativeEventRecord record);
        return record;
    }

    public static bool Add(NarrativeEventRecord record)
    {
        if (record == null || string.IsNullOrEmpty(record.Id) || Events.ContainsKey(record.Id))
        {
            return false;
        }

        Events[record.Id] = record;
        NarrativePersistence.MarkDirty();
        return true;
    }

    public static IEnumerable<NarrativeEventRecord> All() => Events.Values;

    internal static bool Import(NarrativeEventRecord record)
    {
        if (record == null || string.IsNullOrEmpty(record.Id) || Events.ContainsKey(record.Id))
        {
            return false;
        }

        Events[record.Id] = record;
        return true;
    }
}